EP 0907612 B1 20020821 - SILICA CAPABLE OF BEING USED IN TOOTHPASTE COMPOSITIONS
Title (en)
SILICA CAPABLE OF BEING USED IN TOOTHPASTE COMPOSITIONS
Title (de)
ZUR VERWENDUNG IN ZAHNPASTEN GEEIGNETE KIESELSÄURE
Title (fr)
SILICE SUSCEPTIBLE D'ETRE UTILISEE DANS LES COMPOSITIONS DENTIFRICES
Publication
Application
Priority
- FR 9700987 W 19970604
- FR 9607187 A 19960606
Abstract (en)
[origin: WO9746485A1] The invention discloses an abrasive precipitation silica useable in toothpaste compositions, said silica having a BET specific surface ranging from 15 to 300 m<2>/g, a DOP oil absorption ranging from 40 to 160 ml/g, a median particle diameter of at least 10 mu m, generally ranging from 12 to 30 mu m, a particle cohesion factor of at least 85 % about for a median particle diameter ranging from 12 to 20 mu m. Method for preparing silica by reacting an alkaline metal silicate with an acidifying agent, to form a silica slurry, separating and optionally drying the recuperated silica suspension, the operation for forming the slurry being effected according to the following steps: a first step consisting in using one initial heel solution constituted of water, an electrolyte salt of the alkaline or alkaline-earth metal group and optionally of one acidobasic agent; a second step consisting in introducing the silicate and the acidifying agent, the reaction medium pH remaining constant from 4 to 7 and particularly from 5.8 to 6.7; and a third optional step, consisting in acidifying the reaction medium until a silica slurry with a pH of less than 6 and particularly of 4 is obtained. The silica is useful in toothpaste compositions. Toothpaste compositions containing the said silica are also disclosed.
IPC 1-7
IPC 8 full level
A61K 8/00 (2006.01); A61K 8/21 (2006.01); A61K 8/25 (2006.01); A61K 8/66 (2006.01); A61Q 11/00 (2006.01); C01B 33/193 (2006.01)
CPC (source: EP US)
A61K 8/25 (2013.01 - EP US); A61Q 11/00 (2013.01 - EP US); C01B 33/193 (2013.01 - EP US); C01P 2004/50 (2013.01 - EP US); C01P 2004/61 (2013.01 - EP US); C01P 2006/12 (2013.01 - EP US); C01P 2006/19 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE
DOCDB simple family (publication)
WO 9746485 A1 19971211; AT E222566 T1 20020915; AU 3179597 A 19980105; AU 730648 B2 20010308; BG 102961 A 19990730; BR 9709522 A 19990810; CA 2257184 A1 19971211; CA 2257184 C 20030513; CN 1137047 C 20040204; CN 1221393 A 19990630; DE 69714846 D1 20020926; DE 69714846 T2 20030528; EA 000508 B1 19991028; EA 199900001 A1 19990624; EP 0907612 A1 19990414; EP 0907612 B1 20020821; ES 2182096 T3 20030301; FR 2749576 A1 19971212; FR 2749576 B1 19980904; JP 2000502315 A 20000229; JP 3431168 B2 20030728; PL 187629 B1 20040831; PL 330144 A1 19990426; TR 199802525 T2 19990421; US 6187292 B1 20010213
DOCDB simple family (application)
FR 9700987 W 19970604; AT 97927232 T 19970604; AU 3179597 A 19970604; BG 10296198 A 19981126; BR 9709522 A 19970604; CA 2257184 A 19970604; CN 97195269 A 19970604; DE 69714846 T 19970604; EA 199900001 A 19970604; EP 97927232 A 19970604; ES 97927232 T 19970604; FR 9607187 A 19960606; JP 50027998 A 19970604; PL 33014497 A 19970604; TR 9802525 T 19970604; US 19434199 A 19990219